Question

Two cars, A and B, (starting, at the same time, from the same point) are moving with average speed of 40km/h and 50km/h, respectively, in the same direction. find how far will car B be from car A after 3 hours.

Answer 1

The formula of average speed is,

$average \: speed \: = \frac{total \: distance}{total \: time}$

Now total distance covered by car A in 3 hours will be,

= (40)(3) = 120 km

And total distance covered by car B in 3 hours will be,

= (50)(3) = 150 km

Thus, car B is 150-120 = 30 km ahead from car A.

Answer: 30 km